具有自定义格式的XML编写器 [英] XML writer with custom formatting

问题描述

我需要创建一个可读的XML文件。 XmlWriter似乎几乎是完美的，但我想插入换行符，或者一般来说，我想要他们的自定义空白。 WriteRaw 和 WriteWhitespace 似乎在元素中的属性之间起作用。后者看起来应该起作用（此方法用于手动格式化文档），但是会抛出 InvalidOperationException （ Token StartAttribute in state元素内容将导致一个无效的XML文档），如果用于代替下面的评论。

是否有解决方法为XmlWriter或第三方XML支持这个的库？

示例代码（LINQPad语句就绪）：

  var sb = new StringBuilder（）; 
 var settings = new XmlWriterSettings {
 OmitXmlDeclaration = true，
 Indent = true，
 IndentChars =，
}; 
 using（var writer = XmlWriter.Create（sb，settings））{
 writer.WriteStartElement（X）; 
 writer.WriteAttributeString（A，1）; 
 //写入换行符
 writer.WriteAttributeString（B，2）; 
 //写入换行符
 writer.WriteAttributeString（C，3）; 
 writer.WriteEndElement（）; 
} 
 Console.WriteLine（sb.ToString（））; 
  

实际结果：

 < XA =1B =2C =3/> 
  

期望的结果（B和C可能不与A对齐 - 很好，/>可以留下与C）一致：

 < XA =1
 B =2
 C =3
 /> 
  

解决方案

您仍然拥有StringBuilder的背景 - 使用它。 ：

  var sb = new StringBuilder（）; 
 var settings = new XmlWriterSettings {
 OmitXmlDeclaration = true，
 Indent = true，
 IndentChars =，
}; 
 using（var writer = XmlWriter.Create（sb，settings））{
 writer.WriteStartElement（X）; 
 writer.WriteAttributeString（A，1）; 
 writer.Flush（）; 
 sb.Append（\r\\\
）; 
 writer.WriteAttributeString（B，2）; 
 writer.Flush（）; 
 sb.Append（\r\\\
）; 
 writer.WriteAttributeString（C，3）; 
 writer.WriteEndElement（）; 
} 
 Console.WriteLine（sb.ToString（））; 
  

I need to create a human-readable XML file. XmlWriter seems to be almost perfect for this, but I'd like to insert line breaks or, in general, custom whitespace where I want them. Neither WriteRaw nor WriteWhitespace seem to work between the attributes in an element. The latter looks like it should work (This method is used to manually format your document), but throws InvalidOperationException (Token StartAttribute in state Element Content would result in an invalid XML document) if used in place of the comments below.

Is there a workaround for XmlWriter or a third-party XML library that supports this?

Example code (LINQPad-statements ready):

var sb = new StringBuilder();
var settings = new XmlWriterSettings {
    OmitXmlDeclaration = true,
    Indent = true,
    IndentChars = "  ",
};
using (var writer = XmlWriter.Create(sb, settings)) {
    writer.WriteStartElement("X");
    writer.WriteAttributeString("A", "1");
    // write line break
    writer.WriteAttributeString("B", "2");
    // write line break
    writer.WriteAttributeString("C", "3");
    writer.WriteEndElement();
}
Console.WriteLine(sb.ToString());

Actual result:

<X A="1" B="2" C="3" />

Desired result (B and C may be not aligned with A - that's fine, /> can be left on the line with C):

<X A="1"
   B="2"
   C="3"
/>

解决方案

You still has the background StringBuilder - use it. :

  var sb = new StringBuilder();
  var settings = new XmlWriterSettings {
    OmitXmlDeclaration = true,
    Indent = true,
    IndentChars = "  ",
  };
  using (var writer = XmlWriter.Create(sb, settings)) {
    writer.WriteStartElement("X");
    writer.WriteAttributeString("A", "1");
    writer.Flush();
    sb.Append("\r\n");
    writer.WriteAttributeString("B", "2");
    writer.Flush();
    sb.Append("\r\n");
    writer.WriteAttributeString("C", "3");
    writer.WriteEndElement();
  }
  Console.WriteLine(sb.ToString());

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